Comments inside Switch break parser

[barnjamin]

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Compiling auction.tl to build/auction.teal
Error: Pattern ((?P<expression>.*): (?P<block_name>.*)) does not match for SwitchOption for line "# test"

[pbennett]

Speaking of 'switch' - it's not documented in https://tealish.readthedocs.io/en/latest/language.html at all. It's only shown in examples.